How does Blender handle model scale when converting OBJ to blend?
It's likely that there's a unit discrepancy between your MakeHuman export and Blender's default units, which are effectively metric (1BU = 1 meter). OBJ is just a container for sets numbers representing properties of the model, and Blender slots those in at face value unless you tell it otherwise. 

If your model is exported at a height value of 184.30 cm in MakeHuman, Blender is going to input "184.3" into the model's Y dimension property, effectively making it 184.3 Blender Units (meters) tall. 

To correct this on MakeHuman export, you can select "meter" in the Scale Units panel on the righthand side of the frame:



If you can't re-export the model, in the Scene panel, you can change Blender's scene scale units to centimeters (or whatever unit you exported in) before importing model to Blender: 



Last, if you do not want to re-export or re-import, you can simply do a uniform scale on the model until it reaches the desired dimensions in the unit that you've picked for your scene.